Research Outcomes

What Have we Learned?

Information from the Neotripical Flyways Project

In 2018, a literature review was published that synthesized current knowledge of major stopover sites in Central and South America. Although several sites and bottleneck locations are well known, several major gaps in our knowledge were identified, such as the major stopovers for diurnally migrating aerial insectivores.

In 2019, a study of Gray-cheeked Thrushes, Catharus minimus,found that multiple populations of Gray-cheeked Thrushes converged in northern Colombia within an area spanning less than 1% of their breeding range. Arrival date and body condition upon arrival at stopover sites was largely determined by breeding (but not winter) origin, sex, and age. These findings indicate a significant travel bottleneck near Central America that may have effects on overall population fitness and survival.

Selected Publications

Linked PaperYearTitleAuthors
2018Major stopover regions and migratory bottlenecks for Nearctic-Neotropical landbirds within the Neotropics: a reviewBayly, N.J., K.V. Rosenberg, W.E. Easton, C. Gómez, J. Carlisle, D.N. Ewert, A. Drake, and L. Goodrich
2019Range-wide populations of a long-distance migratory songbird converge during stopover in the tropicsGómez, C., S.L. Guerrero, A.M FitzGerald, N.J. Bayly, K.A. Hobson, and C.D. Cadena